it �s a nice idea to create such a website. I have many students that have problems with listening comprehension. Maybe you could divide in elementary, intermediate etc for a better orientation.
I would advise you though to try to block the adds somehow or at least try to see if you can �t have other ads, as I don �t think the parents would appriciate their kids/ teens look at a filipino bikini girl ;) Just an idea ;)

Have a nice evening

Sara